import java.util.*;
/**
 * Created by asus on 2017/4/14.
 */
public class StringBufferDemo {
    public static void main (String [] args){
        StringBuffer buffer = new StringBuffer();
        buffer.append('S');
        buffer.append("tringBuffer");
        System.out.println(buffer.charAt(1));
        System.out.println(buffer.capacity());
        System.out.println(buffer.indexOf("tring"));
        System.out.println("buffer = " + buffer.toString());

    }


}
